Forensic crash investigator Garda Ray Sweeney told an inquest  the purpose of a seatbelt is to restrain a person being thrown from their seat in a crash, with the seatbelt absorbing the force of their mass as they are thrown forward.

The dangers of two people using a single seatbelt were highlighted at an inquest on Tuesday into the death of a eight-year-old girl killed in a two-ca(...)